Chemical and Materials Engineering Vol. 2(7), pp. 160 - 165
DOI: 10.13189/cme.2014.020703
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Structure Dynamical Phase Transitions Studied by Nuclear (Proton) Magnetic Resonance under Visible and Infrared Irradiation


Кashaev R.S.-H *, Gazizov E.G
Каzan State Power Engineering University 420107, Kazan, Esperanto, 62-29

ABSTRACT

Using pulse nuclear (proton) magnetic resonance relaxation measurements by elaborated relaxometers NMR with irradiation in visual and near infrared range of spectra bitumen and oils were studied. Influence of irradiation on relaxation times and protons populations was investigated. Change ofstructure-dynamical parameters of molecular motion from temperature was revealed, which are the evidence of molecular motion activation energies ЕАi alteration. At the same time, on the temperature dependences of T2i sharp jumps are observed. We attributed them to structure-dynamical phase transitions (SDPT), which appear as a result of formation and subsequent destruction of supermolecular nanodimension structures with temperature growth. Laser irradiation of the sample smoothes or remedy SDPT. NMR-parameters dependences upon NIR irradiation of oil sample, prepared with adding of isoparaffin (dokazan), can be explained by "washing down" of this formed nano dimension structures in terms of energetic levels populations behavior. Time dependences of relaxation time in bitumen sample, which was heated and then cooled in natural conditions, also demonstrate SDPT, which are removed by irradiation.

KEYWORDS
Structure-Dynamical Phase Transitions, Proton Magnetic Resonance Relaxometry, Irradiation

Cite this paper
Кashaev R.S.-H , Gazizov E.G (2014). Structure Dynamical Phase Transitions Studied by Nuclear (Proton) Magnetic Resonance under Visible and Infrared Irradiation. Chemical and Materials Engineering, 2 , 160 - 165. doi: 10.13189/cme.2014.020703.